The 256GB DDR4 2400 MHz LR-DIMM Memory Kit from Crucial includes four 64GB load-reduced DIMM modules, suitable for servers that require high-performance memory. These are quad-ranked modules that feature ECC and have a CAS latency of 17. Load-reduced modules help minimize electrical load, allowing more DIMMs to be populated per channel. The result is increased memory bandwidth, improved energy efficiency, and greater memory density when compared to standard DIMMs.